Sole Trader Finance Notes

Most HMRC enquiries into sole traders do not start with fraud. They start with a return that looks odd enough for a computer to flag. Here are the mistakes that trigger those flags, and how to avoid them. Claiming 100 percent of mixed-use costs The classic: a car used for both business and school runs, with 100 percent of fuel, insurance and repairs claimed. Or the full mobile contract, or the entire home internet bill. HMRC expects apportionment, and it expects the method to be reasonable and consistent. Pick a defensible split, write down how you calculated it, and use it every year. Income that does not match third-party data HMRC receives data from banks, platforms and employers. If your declared turnover is 28,000 but your business bank account shows 45,000 of credits, expect a letter. This is the single most common trigger, and it usually comes from sloppy records rather than dishonesty: personal transfers mixed into the business account, or income banked but forgotten. One b...

Sole trader vs limited company: the 2026/27 tax comparison   The question every growing business asks At some point every sole trader looks at the tax bill and wonders whether incorporating would leave more money in their pocket. The honest answer is that it depends on profit levels, how much you need to draw, and how much admin you are willing to carry. The 2026/27 tax year is a useful moment to run the numbers, because the main thresholds remain frozen, so the comparison below rests on settled rates. Always confirm the current figures at gov.uk before acting, since Budgets can move them. How a sole trader is taxed in 2026/27 A sole trader pays income tax on the full profit of the business, whether the money is drawn or left in the business. The personal allowance is £12,570, the basic rate of 20% applies up to £50,270, the higher rate of 40% runs to £125,140, and the additional rate of 45% applies above that. On top of income tax comes Class 4 National Insurance: 6% on profits...

  January is the cruelest month for new sole traders. You file your first Self Assessment, work out your tax bill, pay it, and then HMRC asks for half as much again. Not a penalty, not a mistake: payments on account. Nobody warned you, and suddenly January's tax bill is 150% of what you expected. If you are in your first year or two of self-employment, read this before January. It will save you a very unpleasant surprise. What payments on account actually are Payments on account are advance payments towards next year's tax bill. HMRC requires them from anyone whose Self Assessment tax bill is over £1,000 and who pays less than 80% of their tax through PAYE or other deductions at source. That describes nearly every sole trader. The maths is simple and brutal. Each payment on account is 50% of the previous year's tax bill. The first is due on 31 January, alongside the balancing payment for the year just ended. The second is due on 31 July. So in your first January as a so...

Writing Down Allowances: Pool Rates Sole Traders Actually Use Capital allowances are one of the most valuable tax reliefs available to sole traders, and also one of the least understood. The annual investment allowance gets all the attention: buy qualifying equipment, deduct the full cost, up to the limit. But once the AIA is exhausted or does not apply, the remaining cost goes into writing down allowances. They are worth understanding properly.   What writing down allowances are When you buy plant and machinery for your business and you do not (or cannot) claim the full cost under the annual investment allowance, the remaining cost goes into a pool. Each year, you claim a writing down allowance: a percentage of the pool's balance, which writes off part of the cost for tax purposes. The pool then carries forward at its reduced value, and you claim the allowance again next year, and so on. Think of it as tax depreciation, though with important differences from accounting depre...

By John Thomas, Senior Accountant One of the first accounting decisions a sole trader or partnership makes is also one of the least understood: should you prepare your accounts on the cash basis or the traditional accruals basis? Since the cash basis rules were overhauled from April 2024, with a higher turnover threshold and fewer restrictions, the choice is genuinely open to far more businesses. Here is what each basis means, who each suits, and how to choose. What the two bases mean The accruals basis , also called the traditional basis, records income when it is earned and expenses when they are incurred, regardless of when cash changes hands. Invoice a client in March and get paid in May, and the income belongs to the March accounts. It matches income to the work done and gives the truest picture of performance. The cash basis records income when cash is received and expenses when cash is paid. Invoice in March, paid in May, and the income counts in May. It is simpler, mirrors...

  By John Thomas, Senior Accountant Every year, owner-managers ask the same question: should I incorporate? The answer is arithmetic, not opinion, and it changes with profit levels, the published rate structure, and how much you actually take out of the business. Here is the tax maths for 2026/27, worked through at realistic profit levels. A note before the numbers: the rates and allowances below are the published UK structures as we know them. Budgets can and do move them, so treat this as the framework and check the current figures before acting. The two structures, side by side Sole trader: you pay income tax on profits plus Class 4 National Insurance (6% on profits between £12,570 and £50,270, 2% above that) plus flat-rate Class 2. Your profits are taxed whether or not you withdraw them. Limited company: the company pays corporation tax on profits, and you pay tax personally on what you extract. The standard route is a small salary up to the personal allowance (£12,...